Powder compact



' A. MITCHELL POWDER COMPACT Filed July 22, 1941 Oct. 5, 1943.-

Patented Oct. 5, 1943 COMPACT August Mitchell, Middlebury, Conn,assignor to The Risdon Manufacturing Company, Naugatuck, Conm, a.corporation of Connecticut Application July 22, 1941, Serial No. 403,517

1 Claim.

The invention relates to powder-compact cases and its object issimplification and reduction of manufacturing cost, and particularly tomake the powder-cake tray easily insertable and removable, by thesimplest and least conspicuous means.

The invention is shown in the accompanying drawing wherein Fig. 1 is a.vertical section through the hinge of the case, Fig. 2 a top plan, Fig.3 a larger scale partial perspective, and Fig. 4 a diagram of the blank.

According to this invention, the box body I is made from a sheet metalblank in a punch press in the ordinary way and with a somewhat longerskirt portion than is required to constitute the circumferential wall ofthe finished box. This is represented by the dotted lines in Fig. 4.

Such long-cupped blank is then trimmed down to the general box-bodydimension as indicated by the full lines in the same figure, but so asto leave a narrow finger 2 with a shallow notch 3 on each side of it.

When the box is reduced to finished form this integral finger 2 iscurled over toward th inside of the box to form a hinge-knuckle 4 andits free end, reaching almost to the box bottom, is slightly bowed orotherwise shaped as a spring detent. This detent is for engaging theedge of the tray 5 on which the powder-cake is secured, to hold it downor in place after it has been placed in the box. The tray has the sameshape as'the box and fits it appropriately, so that it will ride overthe hump of the detent or finger and preferably snap under it, beingthereafter held securely in position but capable of removal, whendesired. By selecting the appropriate width for the finger, which is nottoo narrow to constitute a proper hinge-knuckle, the requisiteresilience is obtained so that tray removal can be accom plishedwithout'use of excessive pressure.

Complementary hinge-knuckles ii are -formed on the cover 1, and thehinge is completed by inserting the pintle '8, as will be understood,thus producing an extremely simple case of neat ap- More than oneknuckle can be provided on either the box or cover as desired, and ifgreater security is required for th compacttray the wall of the box bodyon the side opposite the hinge can be indented to form a small pimplemarked 9 in a position to overlie the adjacent edge of the tray, and

thus supplement friction in holding this edge of the tray down.

' A1 hinged case of the kind described comprising a stamped box bodyformed with an integral extension of its side wall, said extension beingcurled to form a hinge knuckle and its free end being extended withinthe box toward the bottom thereof and shaped as a spring detent, in

combination with a tray adapted to fit within the box body to be engagedby and be retained in place'by engagement with said detent, and a coverfor the box having complementary hinge-knuckle formation connected tosaid extension.

AUGUST MITCHELL.

